Kaidan is pleased we killed Benezia, although he feels bad for Dr. T'Soni, but he would've preferred to let the council decide what happened to the rachni, since we kind of don't know anything about that, it happened long before humans were even around this part of the galaxy. Valid point, but that's why I'm the Spectre, and you're my monkey. I make decisions and apologize for them after, I don't wait for other people to make decisions for me.

He doesn't seem to have any personal conversation to contribute, though.